IUPAC Nomenclature
We have already learnt about naming the organic compounds according to
IUPAC guidelines in XI standard. Let us recall the basic rules to name the
alcohols.
1. Select the longest continuous chain of carbon
atoms (root word) containing the functional group ( -OH ).
2. Number the carbon atoms in the chain so that the
carbon bearing the -OH group has the lowest possible number.
3. Name the substituent (if any)
4. Write the name of the alcohol as below.
Prefix + Root word + Primary sufffix + Secondary suffix
(substituents) + (longest chain) + (Saturation /unsaturation) + (ol)
The
following table illustrates the IUPAC nomenclature of alcohols.
Evaluate Yourself:
1. Classify the following alcohols as 1º, 2º, and 3º and give their
IUPAC Names.
2. Write all the possible isomers of an alcohol having the
molecular formula C5H12O and give their IUPAC names.
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